12 . {17 - [(7 . 9 + 7) ÷ 7]}
12 . {17 - [(63 + 7) ÷ 7]}
12 . {17 - [70 ÷ 7]}
12 . {17 - 10}
12 . 7
84
atte. yrz
Vamos là.
12 * { 17 - [(7 * 9 + 7)/7] } =
12 * { 17 - [ 63 + 7 )/7] } =
12 * ( 17 - (70/7)) =
12 * ( 17 - 10 ) = 12 * 7 = 84
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12 . {17 - [(7 . 9 + 7) ÷ 7]}
12 . {17 - [(63 + 7) ÷ 7]}
12 . {17 - [70 ÷ 7]}
12 . {17 - 10}
12 . 7
84
atte. yrz
Vamos là.
12 * { 17 - [(7 * 9 + 7)/7] } =
12 * { 17 - [ 63 + 7 )/7] } =
12 * ( 17 - (70/7)) =
12 * ( 17 - 10 ) = 12 * 7 = 84